ADD: Range for vehicles:
- use the "range=x" setting in the .dat files where x is a number in kilometres representing the maximum distance between stops;
- this simplified system uses the straight line distance between stops as shown in the schedule window to avoid confusion;
- a range of zero, the default, gives an unlimited range;
- waypoints do not count: the distance must be between stops;
- note that there is no minimum wait time enforced at stops